Merge "Bug #949261 Removing nova drivers for Linux Bridge Plugin"
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@ -31,25 +31,25 @@ service with the Linux Bridge plugin.
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# -- Nova configuration (controller node)
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1) Make sure to set up nova using the quantum network manager in the
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1) Ensure that the quantum network manager is configured in the
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nova.conf on the node that will be running nova-network.
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--network_manager=nova.network.quantum.manager.QuantumManager
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network_manager=nova.network.quantum.manager.QuantumManager
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# -- Nova configuration (compute node(s))
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1) Configure the vif driver, and libvirt/vif type
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--connection_type=libvirt
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--libvirt_type=qemu
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--libvirt_vif_type=ethernet
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--libvirt_vif_driver=quantum.plugins.linuxbridge.nova.vif_linuxbridge_quantum.QuantumLibvirtLinuxBridgeVIFDriver
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--linuxnet_interface_driver=quantum.plugins.linuxbridge.nova.linux_net_linux_bridge.QuantumLinuxBridgeInterfaceDriver
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connection_type=libvirt
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libvirt_type=qemu
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libvirt_vif_type=ethernet
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libvirt_vif_driver=nova.virt.libvirt.vif.QuantumLinuxBridgeVIFDriver
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linuxnet_interface_driver=nova.network.linux_net.QuantumLinuxBridgeInterfaceDriver
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2) If you want a DHCP server to be run for the VMs to acquire IPs,
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add the following flag to your nova.conf file:
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--quantum_use_dhcp
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quantum_use_dhcp=true
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(Note: For more details on how to work with Quantum using Nova, i.e. how to create networks and such,
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please refer to the top level Quantum README which points to the relevant documentation.)
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@ -1,117 +0,0 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2012 Cisco Systems, Inc.
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# All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# Extends the linux_net.py kvm/linux network driver in Nova,
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# borrows structure and code
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# @author: Sumit Naiksatam, Cisco Systems, Inc.
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#
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"""Extends the linux_net driver when using the Linux Bridge plugin with
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QuantumManager"""
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from nova import exception
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from nova import log as logging
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from nova import utils
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from nova.network.linux_net import *
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LOG = logging.getLogger(__name__)
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BRDIGE_NAME_PREFIX = "brq"
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GATEWAY_INTERFACE_PREFIX = "gw-"
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def _device_exists(device):
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"""Check if ethernet device exists."""
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(_out, err) = utils.execute('ip', 'link', 'show', 'dev', device,
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check_exit_code=False)
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return not err
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# plugs interfaces using Linux Bridge when using QuantumManager
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class QuantumLinuxBridgeInterfaceDriver(LinuxNetInterfaceDriver):
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def plug(self, network, mac_address, gateway=True):
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LOG.debug(_("inside plug()"))
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dev = self.get_dev(network)
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bridge = self.get_bridge(network)
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if not gateway:
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# If we weren't instructed to act as a gateway then add the
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# appropriate flows to block all non-dhcp traffic.
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# .. and make sure iptbles won't forward it as well.
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iptables_manager.ipv4['filter'].add_rule('FORWARD',
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'--in-interface %s -j DROP' % bridge)
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iptables_manager.ipv4['filter'].add_rule('FORWARD',
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'--out-interface %s -j DROP' % bridge)
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return bridge
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else:
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iptables_manager.ipv4['filter'].add_rule('FORWARD',
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'--in-interface %s -j ACCEPT' % bridge)
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iptables_manager.ipv4['filter'].add_rule('FORWARD',
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'--out-interface %s -j ACCEPT' % bridge)
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if not _device_exists(dev):
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try:
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# First, try with 'ip'
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utils.execute('ip', 'tuntap', 'add', dev, 'mode', 'tap',
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run_as_root=True)
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except exception.ProcessExecutionError:
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# Second option: tunctl
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utils.execute('tunctl', '-b', '-t', dev, run_as_root=True)
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utils.execute('ip', 'link', 'set', dev, "address", mac_address,
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run_as_root=True)
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utils.execute('ip', 'link', 'set', dev, 'up', run_as_root=True)
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if not _device_exists(bridge):
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LOG.debug(_("Starting bridge %s "), bridge)
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utils.execute('brctl', 'addbr', bridge, run_as_root=True)
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utils.execute('brctl', 'setfd', bridge, str(0), run_as_root=True)
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utils.execute('brctl', 'stp', bridge, 'off', run_as_root=True)
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utils.execute('ip', 'link', 'set', bridge, "address", mac_address,
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run_as_root=True)
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utils.execute('ip', 'link', 'set', bridge, 'up', run_as_root=True)
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LOG.debug(_("Done starting bridge %s"), bridge)
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full_ip = '%s/%s' % (network['dhcp_server'],
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network['cidr'].rpartition('/')[2])
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utils.execute('ip', 'address', 'add', full_ip, 'dev', bridge,
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run_as_root=True)
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return dev
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def unplug(self, network):
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LOG.debug(_("inside unplug()"))
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dev = self.get_dev(network)
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try:
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utils.execute('ip', 'link', 'delete', dev, run_as_root=True)
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except exception.ProcessExecutionError:
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LOG.warning(_("Failed while unplugging gateway interface '%s'"),
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dev)
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raise
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LOG.debug(_("Unplugged gateway interface '%s'"), dev)
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return dev
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def get_dev(self, network):
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dev = GATEWAY_INTERFACE_PREFIX + str(network['uuid'][0:11])
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return dev
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def get_bridge(self, network):
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bridge = BRDIGE_NAME_PREFIX + str(network['uuid'][0:11])
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return bridge
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@ -1,73 +0,0 @@
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright (C) 2012 Midokura KK
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# Copyright (C) 2012 Nicira, Inc
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# Copyright (C) 2012 Cisco Systems, Inc
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# Copyright 2012 OpenStack LLC.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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VIF driver for libvirt when QuantumManager is configured with Linux Bridge
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plugin
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"""
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from nova import flags
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from nova import log as logging
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from nova.network import linux_net
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from nova.virt import netutils
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from nova import utils
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from nova.virt.vif import VIFDriver
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from nova import exception
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LOG = logging.getLogger(__name__)
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FLAGS = flags.FLAGS
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class QuantumLibvirtLinuxBridgeVIFDriver(VIFDriver):
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"""VIF driver for Linux Bridge."""
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def get_dev_name(_self, iface_id):
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return "tap" + iface_id[0:11]
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def plug(self, instance, network, mapping):
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iface_id = mapping['vif_uuid']
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dev = self.get_dev_name(iface_id)
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if not linux_net._device_exists(dev):
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try:
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# First, try with 'ip'
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utils.execute('ip', 'tuntap', 'add', dev, 'mode', 'tap',
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run_as_root=True)
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except exception.ProcessExecutionError:
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# Second option: tunctl
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utils.execute('tunctl', '-b', '-t', dev, run_as_root=True)
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utils.execute('ip', 'link', 'set', dev, 'up', run_as_root=True)
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result = {
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'script': '',
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'name': dev,
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'mac_address': mapping['mac']}
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return result
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def unplug(self, instance, network, mapping):
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"""Unplug the VIF from the network by deleting the port from
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the bridge."""
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dev = self.get_dev_name(mapping['vif_uuid'])
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try:
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utils.execute('ip', 'link', 'delete', dev, run_as_root=True)
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except exception.ProcessExecutionError:
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LOG.warning(_("Failed while unplugging vif of instance '%s'"),
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instance['name'])
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raise
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